Three-year experiment was carried out to study the soil chemical and physical properties,rice yield,and economic benefit among conventional farming（CK）,rice-duck farming（A）,rice-fish farming（B） and rice-crab farming（C） system.The results showed that rice farming systems on improving physical property of soil are listed: C＞A＞B.On increasing soil phosphorus nutrients and quality: A＞C＞B.Rice yields of rice-duck farming dropped the least among these systems,then was rice-crab farming.Compared with conventional farming,the economic benefit of these systems added 760.5 yuan/hectare,287.5 yuan/hectare,491.9 yuan/hectare,separately.The results indicated that rice-duck farming system was better than conventional farming system and the other two systems for improving rice growing environment and increasing economic benefit.Rice-duck farming system can be extended and applied as the mainstay model of rice compound ecological technology in this area.